摘要
基性岩床岩浆物理特征的计算＊——以攀枝花层状岩体为例宋谢炎王玉兰张正阶马润则（成都理工学院，成都６１００５９）关键词基性岩浆温度场密度场对流稳定性岩浆分异过程是一个复杂的物理和化学过程，尽管根据岩石学及地球化学研究可以对岩浆分异机制作出定性解释，但这...
Magmatic evolution is a complicated physical chemical process.Although it can be qualitatively explained through petrological and geochemical studies,these explanations leave some questions unanswered.There are several different opinions about mechanisms of magma differentiation and formation of mini rhythm layerings in basic layered intrusions,the principal mechanisms proposed are gravitative accumulation(Wager,1939),in situ crystallization(Jackson,1961),rhythm nucleation(Goode,1976),and double diffusion convection(McBirney,1979).A reason for this uncertainty is that the understanding of convection in magma chambers is ambiguous.For an accurate understanding,it is important to determine possibility,patterns,and scales of convection quantitatively and reasonably.In this paper,we have propose a new method for analyzing fluid dynamic stability of magma in a chamber and for calculating velocity and scale of magma convection quantitatively from calculated fields of temperature,density and viscosity,using Panzhihua layered intrusion as an example.This study is helpful for analyzing both the formation of mini rhythm layering and the magma evolution of Panzhihua layered intrusion.
出处
《矿物岩石地球化学通报》
CAS
CSCD
1997年第1期13-16,共4页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金
关键词
基性岩浆
温度场
密度场
对流
稳定性
basic magma
temperature field
density field
convection
stability
